"Add Product" page freezes entirely when trying to Send for Approval or Save Changes

Hi there! I am trying to sell a monster climbing system on the marketplace through the Maketplace Seller section but I have been hitting the same problem. Every time I fill out the fields on the “Add a Produect” page (Screenshots, images, descriptions, etc) and try to click "Send For approval, the page freezes entirely. This has happened on every computer I have tried it on and I am unsure why.

The only explanation I can come up with is that my account email isn’t verified due to me not having access to it. I have tried to email Epic about changing it but it seems to be taking an extremely long time for them to reply.

Has anyone encountered this before or know of a way to fix this?